This study assessed the personality traits of Oklahoma field extension personnel as related to certain professional and social attributes and to job involvement. A special background questionnaire, a job involvement inventory, and a true false test called the California Psychological Inventory (CPI) were administered to 77 county extension directors, 41 Four H agents, and 42 specialists. Percentages of respondents having above average CPI scores were 68% for the category of poise, ascendancy, and self-assurance; 83% for maturity, socialization, and responsibility; rise of nationalism, ethnic consciousness, and agrarian reform on the nature and and interest modes. Since most subjects had had some postgraduate education, this finding was not considered exceptional. Job involvement was positively related to the traits of sociability, sense of well-being, self-control, achievement through conformance, and interest in making a good impression; but was negatively related to flexibility. Extension personnel with advanced formal education, knowledge of social sciences, high status background (father's occupation), a technical subject specialization, previous teaching experience, a preference for living in medium-sized communities, and preferences for participating in religious and fraternal organizations, scored highest on virtually all CPI items. (LY)